Time and Date Calculators
Countdowns, birthdays, weekday checks, date differences, sleep planning and time-based fun.
Time Since CalculatorCount elapsed days, weeks and years.
Days Until CalculatorCount down to a target date.
Date Difference CalculatorCompare two dates.
Age CalculatorCalculate completed age.
90 Days From TodayFind a future date.
Unix Timestamp ConverterConvert Unix seconds.
Birthday CountdownDays until a birthday.
Sleep Cycle CalculatorEstimate a bedtime.
Day of the WeekFind the weekday for a date.
Half BirthdayFind the six-month birthday date.
Movie MarathonPlan watch time plus breaks.
Weekday CountdownCount weekdays before a date.
Calculation playbooks
Shortcuts, examples and related reading for people who want the math behind the tools.